NOVA"Building Pharaoh's Chariot"
A team of archaeologists, engineers, woodworkers and horse trainers builds and tests two accurate replicas of Egyptian royal chariots. Driving them to their limits in the desert outside Cairo, NOVA's experts test the claim that the chariot marks a crucial turning point in ancient military history.G

5:00 pm

Life On Fire"Pioneers of the Deep"
In the vast emptiness of the Pacific Ocean, tectonic movements construct or swallow islands. In the Tongan archipelago, two little-known animals have learned to cope with these ephemeral lands risen from the ocean depths: the sooty tern, a seabird that never dares wet its wings for fear of drowning, and the Alvin shrimp, a blind crustacean that manages to find its way around the abyss. When an underwater volcano becomes an island, the fates of these two extraordinary paradoxes are linked. D

6:00 pm

Secrets of the Dead"Churchill's Deadly Decision"
Original documents and interviews with surviving British and French sailors reveal the dark side of Britain's fight against the Nazis. In July 1940 France signs an armistice with Germany, agreeing to return French ships to port to sit out the war. Churchill fears Germany will seize the ships. France refuses to give them to England. Churchill must decide whether to destroy the ships before they reach France.G

Nightly Business Report
Macy's, Gap and Target check in with strong January sales. But with smaller paychecks and higher gas prices, NBR's Erika Miller takes a look at whether Americans can keep shopping. Apple says it will weigh calls for it to return more cash to shareholders. D

Life On Fire"Pioneers of the Deep"
In the vast emptiness of the Pacific Ocean, tectonic movements construct or swallow islands. In the Tongan archipelago, two little-known animals have learned to cope with these ephemeral lands risen from the ocean depths: the sooty tern, a seabird that never dares wet its wings for fear of drowning, and the Alvin shrimp, a blind crustacean that manages to find its way around the abyss. When an underwater volcano becomes an island, the fates of these two extraordinary paradoxes are linked. D

11:00 pm

Secrets of the Dead"Churchill's Deadly Decision"
Original documents and interviews with surviving British and French sailors reveal the dark side of Britain's fight against the Nazis. In July 1940 France signs an armistice with Germany, agreeing to return French ships to port to sit out the war. Churchill fears Germany will seize the ships. France refuses to give them to England. Churchill must decide whether to destroy the ships before they reach France.G